Spectral Theory
Fourier analysis is a mathematical technique used to decompose functions or signals into their constituent frequencies, allowing for the study of waveforms and their behaviors. This method is particularly important in understanding how waves propagate, as it enables the representation of complex waveforms as sums of simpler sine and cosine functions. By analyzing these frequency components, one can gain insights into various physical phenomena, including sound, light, and other types of waves.
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